[clang] [CIR] Upstream initial support for fixed size VectorType (PR #136488)

[Erich Keane via cfe-commits]

================
@@ -654,6 +654,25 @@ cir::VectorType::getABIAlignment(const ::mlir::DataLayout &dataLayout,
   return llvm::NextPowerOf2(dataLayout.getTypeSizeInBits(*this));
 }
 
+mlir::LogicalResult cir::VectorType::verify(
+    llvm::function_ref<mlir::InFlightDiagnostic()> emitError,
+    mlir::Type eltType, uint64_t size) {
+  if (size == 0)
+    return emitError() << "the number of vector elements must be positive";
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erichkeane wrote:

```suggestion
    return emitError() << "the number of vector elements must be non-zero";
```

https://github.com/llvm/llvm-project/pull/136488